Eight risk analysis and control measures for dangerous operations

No.

Risk Analysis

Safety measures

Confirmor

1

Flammable and explosive substances

1 Clean and replace the materials in the fire-fighting equipment and pipelines and pass the analysis.

2 Storage tanks shall be ignited to remove flammable substances. The tank shall be filled with clean water or inert gas protection.

3 The device is protected by (nitrogen, water vapor).

4 The fire in the tower was soaked with asbestos cloth and placed on two adjacent trays for isolation.

5If you enter the restricted space, you must apply for a "Constrained Space Operation Certificate."

 

2

Mars breaks into other equipment or flammable materials and invades hot equipment

Cut off the equipment pipeline that is connected with the hot-swappable equipment, add a blanking block, block the block, and apply for the "Closing blinding operation certificate."

 

3

There are flammable materials around the hot spot

(1) Remove flammable materials around the hot point, and drain the nearby wells, floor drains, trenches, cable trenches, etc. before removing the flammable materials.

2 The cable should be ignited and the flammable gas and liquid should be removed from the trench. If necessary, the two ends of the trench should be isolated.

 

4

Leakage current (induction) hazard

The welding circuit line should be lapped on the weldment and must not be overlapped with other equipment. It is forbidden to cross the sewer (well).

 

5

Mars splash

1       Fireworks at high altitudes will be used to apply for the “High Work Permit” and measures will be taken to prevent sparks from splashing.

2 Pay attention to the direction of the Mars splash, and use water to shower the Mars.

 

6

Insufficient or improperly spaced cylinders

1 The distance between oxygen cylinders and dissolved acetylene cylinders shall not be less than 5m , and the distance between the two cylinders and the hot fire shall be no less than 10m .

2 Gas cylinders are not allowed to be exposed to the sun. Dissolving acetylene cylinders is prohibited.

 

7

Electric and gas welding tools have defects

Before hot work, electrical and gas welding tools should be inspected to ensure safety and reliability.

 

8

During operation, flammable materials leak out

In the process of burning fire, if there is running material, string material and flammable gas, the hot work shall be stopped immediately.

 

9

Bad ventilation

1 When the room is hot, the doors and windows shall be opened, the surrounding equipment shall be covered, the water funnel shall be sealed, the oil shall be removed, and no flammable substances such as solvents shall be cleaned nearby.

2 using partial forced ventilation;

 

10

Not regularly monitored

1 The interval between sampling and hot work shall not exceed 30 minutes . If this interval is exceeded or if the interruption time of hot work exceeds 30 minutes , it shall be resampled and analyzed.

2       The sampling point should be representative, and the special dynamic analysis sample should be kept until the end of the moving fire.

3 During the process of moving fire, when the fire is interrupted, there shall be no residual fire on the site. Before the reheating, the site conditions shall be carefully checked for any changes. If there is any change, no fire shall be allowed.

 

11

Improper monitoring

1 Fire monitorers should be familiar with the site environment and check to ensure that safety measures are in place, have relevant safety knowledge and emergency skills, maintain contact with the positions, keep abreast of changes in working conditions, and stick to the scene.

(2) The fire-fighting person shall extinguish the spark of splash at any time and shall immediately notify the person who is in a hot state to stop the operation and contact the person concerned to take measures.

 

12

Insufficient emergency facilities or inadequate measures

1 Fire extinguishing tools (such as steam pipes, water pipes, fire extinguishers, sand, iron mills, etc.) are provided on site.

2 The fixed foam fire extinguishing system is pre-started.

 

13

Involving hazardous work combinations, failing to implement corresponding safety measures

In case of hazardous operations such as lower kettles, high places, blinding blinds, pipeline equipment maintenance operations, etc., the relevant operation permit shall be issued at the same time.

 

14

Major changes in construction conditions

If there is a major change in construction conditions, the “Class * Hot Work Permit” should be re-applied.

 

No.

Risk Analysis

Safety measures

Confirmor

1

Isolated unreliable

1 The material, steam, and nitrogen lines connected to the equipment shall be blocked by blank plates, and shall apply for the "Closing blinding operation certificate."

2 Dismantle the relevant pipeline

 

2

Mechanical damage

To handle the equipment outage procedures, cut off the power supply of the equipment, hang the “Forbidden Closing” warning sign, and supervise the personnel.

 

3

Replacement failed

After the replacement is completed, the sample is analyzed and passed.

 

4

Oxygen deficiency

The oxygen content of the equipment reaches 18 to 21 %.

 

5

Bad ventilation

1 Open the device vents for natural ventilation.

2 Use forced ventilation.

3 Wear an air respirator or long tube mask.

(4) Use ducted air to supply air. Before ventilation, the medium and wind source in the pipeline must be analyzed and confirmed. It is forbidden to introduce oxygen to supplement oxygen.

5 The temperature inside the equipment must be suitable for personnel operations.

 

6

Not regularly monitored

1 Within 30 minutes before the operation, gas sampling must be analyzed in the equipment. Only qualified equipment can enter the equipment.

2 sampling points should be representative.

3 The regular monitoring should be strengthened in the operation, and the abnormal situation should immediately stop the operation.

 

7

Electric shock hazard

1 The lighting voltage in the equipment should be less than or equal to 36V , and the operation in damp containers and narrow containers should be less than or equal to 12V .

2 Use a hand-held power tool that exceeds the safe voltage and must be equipped with a leakage protector as required.

 

8

Inappropriate protective measures

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